title: Switch from NP-specific IgG3 to IgG1 in the mouse hybridoma cell line S24/63/63.
abstract: We have isolated by fluorescence-activated cell sorting an IgG1 expressing class switch variant (S24-1/47) from the IgG3-producing mouse hybridoma cell line S24/63/63. Both Ig bind the hapten 4-hydroxy-3-nitro-phenylacetyl (NP) with approximately the same affinity and fine specificity and are idiotypically indistinguishable. The apparent m.w. is 50,000 for the gamma 1 and 51,000 for the gamma 3 chain. The genomic DNA of IgG3-producing S24/63/63 cells contains a 14-kb Eco RI restriction fragment with C gamma 3 sequences representing a rearranged C gamma 3 gene. In the class switch variant S24-1/47 the C gamma 3 gene is deleted.
mesh_terms: D000818:Animals; D001665:Binding Sites; D002460:Cell Line; D002469:Cell Separation; D002999:Clone Cells; D014644:Genetic Variation; D006041:Goats; D006241:Haptens / Q000276:immunology*; D006825:Hybridomas / Q000276:immunology*; D007127:Immunoglobulin Constant Regions / Q000235:genetics; D007074:Immunoglobulin G / Q000235:genetics / Q000276:immunology* / Q000378:metabolism; D007143:Immunoglobulin Heavy Chains / Q000235:genetics; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D009596:Nitrophenols / Q000276:immunology*; D010648:Phenylacetates; D011817:Rabbits
chemical_list: D006241:Haptens; D007127:Immunoglobulin Constant Regions; D007074:Immunoglobulin G; D007143:Immunoglobulin Heavy Chains; D009596:Nitrophenols; D010648:Phenylacetates; C026242:4-hydroxy-5-nitrophenyl acetic acid